ZIP Code 54123

54123 is one of Wisconsin's ZIP codes, delivering to addresses in Forest Junction, Calumet County.

City: Forest Junction
County: Calumet County
State: Wisconsin
Prefix: 541xx

Where this code sits

54123 is part of the 541xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Forest Junction.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 54123 delivers to without sharing its boundary.

ZIP codes nearest 54123

The ZIP codes whose reference points sit closest to 54123.
ZIP code	Distance	Delivers to
ZIP code 54110	3.9 mi	Brillion, WI
ZIP code 54129	6.7 mi	Hilbert, WI
ZIP code 54160	6.8 mi	Potter, WI
ZIP code 54169	7.1 mi	Sherwood, WI
ZIP code 54180	8.0 mi	Wrightstown, WI
ZIP code 54126	8.1 mi	Greenleaf, WI
ZIP code 54130	8.5 mi	Kaukauna, WI
ZIP code 54113	9.2 mi	Combined Locks, WI

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 54123, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 54123. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.